pigment
Moisture Content of Pigments Experiment
Description
The data frame pigment , a design object, has 60 rows (15 batches
of pigment times 2 samples drawn from each batch times 2 analyses on
each sample) and 4 columns.
Arguments
| Batch |
factor naming one of 15 batches of pigment, B1 through B15 .
|
| Sample |
factor specifying one of two samples (from any batch).
Levels are: S1 and S2 .
|
| Test |
factor specifying one of two analyses (run on any sample).
Levels are: T1 and T2 .
|
| Moisture |
numeric vector giving the outcome variable, the moisture content of the sample.
|
Source
Box, G. E., Hunter, W. G.,
and Hunter, S. (1978) Statistics for Experimenters.
J. Wiley and Sons, NY, p. 572.
John M. Chambers and Trevor J. Hastie, (eds.) Statistical Models in S,
Wadsworth and Brooks, Pacific Grove, CA 1992, pg. 160.
Examples
data(pigment)
praov <- aov(Moisture ~ Batch/Sample, data=pigment)